Comtech Radyne DMDVR20 LBST Digital L-Band Satellite Modem
2.4 Kbps to 20 Mbps, 1 bps steps
DMDVR20 LBST L-Band Modem
The Comtech Radyne DMDVR20 LBST is based on the proven design and technology of the DMD20 Universal Satellite Modem and the DD240 professional grade MCPC satellite demodulator with industry leading reliability.
The DMDVR20 LBST is ideal for high quality private networks requiring low latency and low jitter transmission. With its ability to support asymmetrical link operation with IESS compliant transmission and LDPC reception, the LBST can receive large shared TDM carriers and provide small to medium sized return carriers for data/voice/video applications in a hub and spoke environment. DMDVR20 LBST is one of the most advanced remote site terminals in a single one rack unit size.
The VR20's impressive remote management capability surpasses all others in the field. It can be remotely monitored and controlled via the RLLP (Radyne Link Level Protocol) or through the RS-232 Terminal port.
Supported by an extensive line of redundancy switches, converters, encoders and decoders, the DMD-VR20-LBST can be integrated into any network compatible with the MD2401 Quad Demodulator and the DM240XR Broadcast modulator.
Features
Demodulator Modulator
IESS-309/310/314/315 compliant Satellite Modulator Configurable for unframed clear channel serial data transmission for Telco grade hub & spoke services
950 to 2050 MHz L-Band Operation, 1 Hz steps
Supports MCPC/SCPC networks using industry standard
BPSK/QPSK/OQPSK/8PSK/16-QAM modulation LDPC
2.4 Kbps to 20 Mbps, 1 bps steps
950 to 2150 MHz L-Band operation, 1 Hz steps
Forward Error Correction (FEC) – Viterbi, Reed-Solomon,
QPSK/8PSK/16APSK demodulation Trellis, Turbo Product Code
2.0 Mbps to 20 Mbps, 1 bps steps
Integrated 10 MHz high-stability BUC reference
Optional 24 or 48 VDC for up to 10 W BUC
Hardware Options
Turbo FEC (Transmit)
48 VDC Input Power
High-Stability Reference
BUC/LNB Power
Industry standard forward error correction LDPC+BCH
LNB Power: 18 VDC ± 0.5 V (350 mA max.)
Interface Options
Data Rate Upgrades
RS-530/422 Serial
8PSK (Modulator/ Demodulator)
16-QAM (Modulator)
16APSK (Demodulator)
|
Modulation |
BPSK, QPSK, and OQPSK (8PSK, 8-QAM & 16-QAM optional) |
|
L-Band Tuning Range |
950 to 2050 MHz in 1 Hz steps |
|
Impedance |
50 Ohm |
|
Connector |
Type N female |
|
Return Loss |
10 dB minimum |
|
Output Power |
0 to -25 dBm |
|
Output Accuracy |
± 1.0 dB over frequency and temperature |
|
Output Spectrum |
Meets IESS-308/309/310 power spectral mask (DVB-S optional) |
|
Spurious |
-55 dBc In-band -45 dBc Out-of-band |
|
Harmonics |
-45 dBc |
|
On/Off Power Ratio |
>60 dB |
|
Scrambler |
CCITT V.35 or IBS (others optional) |
|
FEC |
Viterbi, K=7 at 1/2, 3/4 and 7/8 Trellis 2/3 Sequential 1/2, 3/4 and 7/8 (optional) Turbo Product Code (optional) BPSK: 21/44 QPSK/OQPSK: 1/2 (21/44), 3/4, 7/8 8PSK/8-QAM, 16-QAM: 3/4, 7/8 Legacy Turbo Rates: 0.495, 0.793 (optional) LDPC (optional) BPSK: 1/2 QPSK/OQPSK: 1/2, 2/3, 3/4 8PSK/8-QAM: 2/3, 3/4 16-QAM: 3/4 |
|
Outer Encoder Options |
Reed-Solomon Intelsat (DVB-S optional) Custom (N, K) Reed-Solomon (optional) |
|
Data Clock Source |
Internal, external, RX recovered |
|
Internal Stability |
5 x 10-8 |
|
BUC DC Voltage |
BUC 24 V @ 4 A maximum BUC 48 V (optional) |
|
BUC Reference |
10 MHz, 3 dBm ± 3 dB |
|
BUC FSK |
710/590 KHz nominal (optional) |
Users• Broadcasters • Internet Service Providers • Enterprise |
Common Applications |
|
• Direct To Home • Broadcast Contribution and Distribution • Satellite News Gathering • Broadband Interactive Services • Digital Cinema • Enterprise • High Speed Content Delivery • IPTV / Business Television |
